The KBX184AR.14 BK 7 Bi-Convex Lens is a 2 inch (50.8 mm) diameter, 430 to 700 nm anti-reflection coated, BK 7 bi-convex lens with an effective focal length of 1000 mm. It is designed to meet the demanding requirements of laser electro-optic applications. Newport's BK 7 precision bi-convex lenses are manufactured from fine annealed optical glass and are polished to tight tolerances using master test plates to ensure minimum wavefront distortion.
| Model | KBX184AR.14 |
|---|---|
| Lens Type | Spherical |
| Lens Shape | Bi-Convex |
| Effective Focal Length | 1000 mm |
| Diameter | 2.00 in. (50.8 mm) |
| Antireflection Coating | 430-700 nm (AR.14) |
| Lens Material | Grade A BK 7 |
| Center Thickness (Tc) Tolerance | ±0.1 mm |
| f/# | 19.6 |
| Surface Quality | 40-20 scratch-dig |
| Diameter Tolerance | +0/-0.1 mm |
| Te | 3.0 mm |
| Edge Thickness (Te) Tolerance | Nominal Value |
| Focal length tolerance | ±1 % |
| BFL | 998.80 mm |
| FFL | 998.80 mm |
| Radius of Curvature | 1033.022 mm |
| P1 | 1.19 mm |
| P2 | -1.19 mm |
| Clear Aperture | ≥central 90% of diameter |
| Centration, Spherical Lenses | ≤3 arc min |
| Surface Accuracy, Irregularity (lambda) | λ/4 |
| Surface Accuracy, Power (lambda) | 1.5 λ |
| Chamfers | 0–0.8 mm face width |
| Chamfers Angle/Tolerance | 45° ±15°, typical |
| Cleaning | Non-abrasive method, acetone or isopropyl alcohol on lens tissue recommended |
